- Socket made from chrome vanadium alloy steel - Bit made from silicon alloy steel (S2) - Polished, chrome plated - For torx plus tamper screw - IPR20 for the operation of the screwed connection of the plug-in pump on MERCEDES-BENZ Atego and Actros MAZDA 3 1.4 and 1.6 - IPR25 for the screwed connections at the control unit and the air flow sensor on VW - DIN 3120